Don’t talk about sex in your profile. On the one hand it shows desperation, no matter what you say or how you say it. And on the other hand, it shows a desire to show off that is simply not attractive.
We’ve seen so many profiles on dating sites that boil down to “I like sex!” Gee, really? We’d never have guessed. All it looks like is some immature guy desperate to tell the world that he’s so adult and he’s having sex and, oh my God, he LIKES it! Wow!
Seriously, it’s pathetic, immature, and a massive turn-off. You’ll have plenty of time to talk about sex later in your relationship. Don’t feel the urge to start now.